Polishing-wheel.



L. J." DOUGLASS.

v POLISHING WHEEL. APPLlbATloN FILED Aua.21. 1915. RENEwED/\ue.24,191e.

l ,290,926 Patented Oct. 10, 1916.

gno'c u Foz LEWIS J. DOUGLASS, 0F HAHIDWICK, VERMQN'IQSSGNOR TO M.WRIGHT SON i .zoenen COMrANY, or BUTNAMVILLE, vnnivronr, .a FIRM.

POLISHING-WHEEL.

Specicatifettersatent. h Patented Oct. 10, i916.

Application tiled August 21, 1915, Serial No. 46,694. Renewed August 24,1916. Serial N0. 116,761.

To all whom 'it may concern:

Be it known that I, Lewis' J. DoUGLAss, a citizen ofthe United States,residing at Hardwick, in the county of Caledonia and State of Vermont,have invented certain new and useful Improvements in Polishing-W'heela'of which the" following isa speer lication. i

The invention has .for an object to effect improvements in polishingwheels such as are used vfor polishing stone, aiming to 1ncrease theetlicienoy of the 'wheels and also to prolong the life thereof.

It is an important object to form the Wheel with a. wor-lt engaging faceof such a character that the abrasive material used in connectiontherewith will be held thereunder when in use, and at the 'same timewill cause a uniform utilization of the abrasive overthe major tothe-center of the wheel vto compensate for the tendencyv of such wheelsto wear more at one side than at the other which requires 'known torequire no illustration.

wheels to be discarded often before they have given proper length ofservice, and whilethereis stil-l a` goed am'ountvof 1nat`erial in them.i g, p

Another purpose is toprovide a simple form of construction .for anadjustable connection of the character indicated.

Additional obi-eats advantages and features of invention will appearfrom the con-` struction7 arrangement and combination of partshereinafter described and shown in the drawings, in whichy Figure 1 is afragmentary top view of a grinding wheel, Fig. 2. is a fragmentaryperspective View thereof, Fig. 3 is a bottom view thereof, Fig. 4 is avertical sectional view on the line 4:-4 of Fig. 3.

There is illustrated a wheel l0 which may be used with any of thefamilial' machines for 4polishing stone now generally in use.l theconstruction of which is suiiiciently well It comprises a circular diskor top plate body portion 11 of a size and thickness corresponding tothat of similar parts in wheels generally partof the areafcovered by.the wheel.

used, and upon its lower side there are provided two scroll flanges 12each starting closely adjacentthe outer edge of the disk 11 atdiametrically opposite points and eX- tending over a radius ofapproximately two hundred and siXty-ive degrees with respect to thecenter of the disk, leaving a large approximately circular space 13between them in which are located a number of L-shaped :[ian'ges innested sets, as at 14 and 15. The end portions vof each of these flangesare disposed at an angle of approximately one hundred and thirty'ivedegrees to each other.

It will be noted that the inner ends of each' scroll ange are overlappedwith the outer en d ofthe other a short distance, forming a channellG ateach side of the wheel, the flanges being spaced from each other. Theilznges 14 and 1li 'are similarly spaced from eachother, and the setsare respectively vpositioned so that the ends of the lianges therein aredisposed closely adjacent the inner ends of the channels 16, the ends ofsome of the flanges 14 and 15 being disposed in line with the passages.The outermost flanges 14 and 15 are spaced `somewhat closer toLrespective' scroll anges than the width ofthe channels 16, although'this is not invariable.` The ends of the flanges 14 and 15 farthest fromthe respective adjacent channels 16 stop short of the flanges at theadjacent sides of rhedisk.

' On the top side of the wheel diametrical channels 1S and 19 are formedcentrally of yhe wheel and at right angles to each other, the sides ofthese channels-fleeing formed by lf-shaped ribs 20 cast integrally withthe disk 11 located on respective quarters of the disk, their opposedsides being under-cut as at 2l in Fig. 2. A pivot plate 22 is provided,

shaped and @proportioned lto engage snugly and slidably ineither of thechannels 18 and 19. 'his plate v'is provided with two ears or lugs 23,having registered openings 24 therethrough, the lugsfiieing centrallylocated on the plate'll andsspaced and proportioned suitably forengaginent with the usual rotatingconnections ofpolishing wheels. Theplate 22 extends a considdrable distance outwardly of theselugs at eachend,

fora reason which Will-appear, and interi5 l connections and decreasingits lpolishing efficiency. lVhen the beginning of such Wear g tl'iatgtheears 23' are .moved tow-ardV the 2o nels serve tQjl-loldthe abrasivematerial un'- x2'5 therein;

-ln se, the plate 22 is initially adjusted inV anced and 1 rected.

*.mediatelyof each end portionof the plateabinclf'zigscrew is engagedtherethrough,

adaptedtobearfagainst the-bottom' of the channels 18 or vl 1en` theplate is. engaged either of the channels. 18 and l 19 `Withjthe i lugsequally spaced from-thecenter olithe wheel 10. If the wheel' wears.unevenly, one side becoming worn Inore'than the other,

the tendency-isA for'tlie' worn side to wear at -an Increased rate.while the jthlcker side thicker side ofthe whfe'el, thewheelisibalthe-tendency to'uneven Wear.' cor- In rotating ,upon work thescroll chander the. Wheel, While the-flanges 1 4 and V15 utilize thematerial efficiently without tendofthe-wheel is utilized: over and over,being ing to gather ittowardfthe center in van objectionable quantity,By tl1e' ol"set relation of the two sets of L shapedflanges,V the abra'-sive under -thecent'ralmajor body; portion moved first one Way andthenanother. i )ne .tends to throw it outwardly.

' 'i. It' 's 4obvious that my' Wheelsj canbe qliicljrly mountedanddismounted, and the pivotal connections with the 'driving means .may bepermanent, it'being only necessary to loosen thesetscrews 25 and slipthe plate '22 from between the"rib s.20`fo'r removal of 4the-'wheel iThe manufacture of simple and `involves no 'greater expense than myj-Wheel 'is quite lerally used.

the production. ol the ordinary wheel gen-v 2.1. A wheel oftheclassdescribed compris- -ing atop body portion having twodiametrica'l .intersecting; channels formed thereon, ai plate shaped tofit snugly in the channels alternatively, means. to form operativeconnections with the Wheel .centrally of the plate, andmeans to' fix-theplate. to the body.

2. A wheel ofthe class described comprising a top'` plate body aplurality of scroll l f'langeson the under'iside thereof adjacent theedge, stopping shortof thecentera considerable distance whereby a largespace is 4left-imvarclly thereof, anda multiplicity of separate Lfshapedflanges in nested relation. but spaced al part 'within said space thelast "fnamedj'f'langes being so positionedthat a portion vo f` each willengage particles of abrasive material under' rotation of .the

wheel at. afgreater angle of incidence thanthe scroll flanges, andcertain vother portions i thereof .will 'ward material engaged out-\'vardly. .i f An'abradingwh'eel comprising a topI plate body, *scrollvflanges' thereon adjacent the' edge' for inwarddraft ofabrasive, the

scroll iianges terminating close. to the -edge of the] plate, respectivesets of nested L-shaped flanges on the-plate. within the scroll .Hangeshaving rectilinear portions at l each end and having thelr'angularapices, thematerlal 1nv va'rd,ivhllethe'v other end 35presentedfoutwardly on `the plate, the ends ".ofeach setin the directionof rotation being located .close behind the mnerterminations ofrespective .scroll flanges.

- In testimony whereof I have alixed BERNARD J. MULCA1-1Y, i OSCAR L'.Snnrann,

iso

l i. LEWIS JanoUGLAss. n 7

lVitnessesi'-f

